| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "StaticLayout" |
| |
| #include "ScopedIcuLocale.h" |
| #include "unicode/locid.h" |
| #include "unicode/brkiter.h" |
| #include "utils/misc.h" |
| #include "utils/Log.h" |
| #include <nativehelper/ScopedStringChars.h> |
| #include <nativehelper/ScopedPrimitiveArray.h> |
| #include <nativehelper/JNIHelp.h> |
| #include "core_jni_helpers.h" |
| #include "scoped_nullable_primitive_array.h" |
| #include <cstdint> |
| #include <vector> |
| #include <list> |
| #include <algorithm> |
| |
| #include "SkPaint.h" |
| #include "SkTypeface.h" |
| #include <hwui/MinikinSkia.h> |
| #include <hwui/MinikinUtils.h> |
| #include <hwui/Paint.h> |
| #include <minikin/FontCollection.h> |
| #include <minikin/AndroidLineBreakerHelper.h> |
| #include <minikin/MinikinFont.h> |
| |
| namespace android { |
| |
| struct JLineBreaksID { |
| jfieldID breaks; |
| jfieldID widths; |
| jfieldID ascents; |
| jfieldID descents; |
| jfieldID flags; |
| }; |
| |
| static jclass gLineBreaks_class; |
| static JLineBreaksID gLineBreaks_fieldID; |
| |
| static inline std::vector<float> jintArrayToFloatVector(JNIEnv* env, jintArray javaArray) { |
| if (javaArray == nullptr) { |
| return std::vector<float>(); |
| } else { |
| ScopedIntArrayRO intArr(env, javaArray); |
| return std::vector<float>(intArr.get(), intArr.get() + intArr.size()); |
| } |
| } |
| |
| static inline minikin::android::StaticLayoutNative* toNative(jlong ptr) { |
| return reinterpret_cast<minikin::android::StaticLayoutNative*>(ptr); |
| } |
| |
| // set text and set a number of parameters for creating a layout (width, tabstops, strategy, |
| // hyphenFrequency) |
| static jlong nInit(JNIEnv* env, jclass /* unused */, |
| jint breakStrategy, jint hyphenationFrequency, jboolean isJustified, jintArray indents) { |
| return reinterpret_cast<jlong>(new minikin::android::StaticLayoutNative( |
| static_cast<minikin::BreakStrategy>(breakStrategy), |
| static_cast<minikin::HyphenationFrequency>(hyphenationFrequency), |
| isJustified, |
| jintArrayToFloatVector(env, indents))); |
| } |
| |
| // CriticalNative |
| static void nFinish(jlong nativePtr) { |
| delete toNative(nativePtr); |
| } |
| |
| static void recycleCopy(JNIEnv* env, jobject recycle, jintArray recycleBreaks, |
| jfloatArray recycleWidths, jfloatArray recycleAscents, |
| jfloatArray recycleDescents, jintArray recycleFlags, |
| jint recycleLength, const minikin::LineBreakResult& result) { |
| const size_t nBreaks = result.breakPoints.size(); |
| if ((size_t)recycleLength < nBreaks) { |
| // have to reallocate buffers |
| recycleBreaks = env->NewIntArray(nBreaks); |
| recycleWidths = env->NewFloatArray(nBreaks); |
| recycleAscents = env->NewFloatArray(nBreaks); |
| recycleDescents = env->NewFloatArray(nBreaks); |
| recycleFlags = env->NewIntArray(nBreaks); |
| |
| env->SetObjectField(recycle, gLineBreaks_fieldID.breaks, recycleBreaks); |
| env->SetObjectField(recycle, gLineBreaks_fieldID.widths, recycleWidths); |
| env->SetObjectField(recycle, gLineBreaks_fieldID.ascents, recycleAscents); |
| env->SetObjectField(recycle, gLineBreaks_fieldID.descents, recycleDescents); |
| env->SetObjectField(recycle, gLineBreaks_fieldID.flags, recycleFlags); |
| } |
| // copy data |
| env->SetIntArrayRegion(recycleBreaks, 0, nBreaks, result.breakPoints.data()); |
| env->SetFloatArrayRegion(recycleWidths, 0, nBreaks, result.widths.data()); |
| env->SetFloatArrayRegion(recycleAscents, 0, nBreaks, result.ascents.data()); |
| env->SetFloatArrayRegion(recycleDescents, 0, nBreaks, result.descents.data()); |
| env->SetIntArrayRegion(recycleFlags, 0, nBreaks, result.flags.data()); |
| } |
| |
| static jint nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr, |
| // Inputs |
| jcharArray javaText, |
| jlong measuredTextPtr, |
| jint length, |
| jfloat firstWidth, |
| jint firstWidthLineCount, |
| jfloat restWidth, |
| jintArray variableTabStops, |
| jint defaultTabStop, |
| jint indentsOffset, |
| |
| // Outputs |
| jobject recycle, |
| jint recycleLength, |
| jintArray recycleBreaks, |
| jfloatArray recycleWidths, |
| jfloatArray recycleAscents, |
| jfloatArray recycleDescents, |
| jintArray recycleFlags, |
| jfloatArray charWidths) { |
| |
| minikin::android::StaticLayoutNative* builder = toNative(nativePtr); |
| |
| ScopedCharArrayRO text(env, javaText); |
| ScopedNullableIntArrayRO tabStops(env, variableTabStops); |
| |
| minikin::U16StringPiece u16Text(text.get(), length); |
| minikin::MeasuredText* measuredText = reinterpret_cast<minikin::MeasuredText*>(measuredTextPtr); |
| minikin::LineBreakResult result = builder->computeBreaks( |
| u16Text, *measuredText, firstWidth, firstWidthLineCount, restWidth, indentsOffset, |
| tabStops.get(), tabStops.size(), defaultTabStop); |
| |
| recycleCopy(env, recycle, recycleBreaks, recycleWidths, recycleAscents, recycleDescents, |
| recycleFlags, recycleLength, result); |
| |
| env->SetFloatArrayRegion(charWidths, 0, measuredText->widths.size(), |
| measuredText->widths.data()); |
| |
| return static_cast<jint>(result.breakPoints.size()); |
| } |
| |
| static const JNINativeMethod gMethods[] = { |
| // Fast Natives |
| {"nInit", "(" |
| "I" // breakStrategy |
| "I" // hyphenationFrequency |
| "Z" // isJustified |
| "[I" // indents |
| ")J", (void*) nInit}, |
| |
| // Critical Natives |
| {"nFinish", "(J)V", (void*) nFinish}, |
| |
| // Regular JNI |
| {"nComputeLineBreaks", "(" |
| "J" // nativePtr |
| |
| // Inputs |
| "[C" // text |
| "J" // MeasuredParagraph ptr. |
| "I" // length |
| "F" // firstWidth |
| "I" // firstWidthLineCount |
| "F" // restWidth |
| "[I" // variableTabStops |
| "I" // defaultTabStop |
| "I" // indentsOffset |
| |
| // Outputs |
| "Landroid/text/StaticLayout$LineBreaks;" // recycle |
| "I" // recycleLength |
| "[I" // recycleBreaks |
| "[F" // recycleWidths |
| "[F" // recycleAscents |
| "[F" // recycleDescents |
| "[I" // recycleFlags |
| "[F" // charWidths |
| ")I", (void*) nComputeLineBreaks} |
| }; |
| |
| int register_android_text_StaticLayout(JNIEnv* env) |
| { |
| gLineBreaks_class = MakeGlobalRefOrDie(env, |
| FindClassOrDie(env, "android/text/StaticLayout$LineBreaks")); |
| |
| gLineBreaks_fieldID.breaks = GetFieldIDOrDie(env, gLineBreaks_class, "breaks", "[I"); |
| gLineBreaks_fieldID.widths = GetFieldIDOrDie(env, gLineBreaks_class, "widths", "[F"); |
| gLineBreaks_fieldID.ascents = GetFieldIDOrDie(env, gLineBreaks_class, "ascents", "[F"); |
| gLineBreaks_fieldID.descents = GetFieldIDOrDie(env, gLineBreaks_class, "descents", "[F"); |
| gLineBreaks_fieldID.flags = GetFieldIDOrDie(env, gLineBreaks_class, "flags", "[I"); |
| |
| return RegisterMethodsOrDie(env, "android/text/StaticLayout", gMethods, NELEM(gMethods)); |
| } |
| |
| } |